Switch between elements on combobox change

Switch between elements on combobox change

I have a combobox with static values (0,1,2). For '2', I want to switch between 2 sets of components to display. The first set I have the DateTime field from here. The second is just a textfield. I want to do this in a generic method that doesn't reference the objects by an ID or assume there's (n) components available. For structure, do I include all components, just hidden:true then show()/hide() on my change listener? Also, when I try to query name!= I get what I was NOT looking for. See below.